Cryptomalware – also known as cryptojacking – is when attackers install undetectable malware on a victim’s computer in order to use their computing resources to mine cryptocurrency. With the popularity of all kinds of cryptocurrency surging, this type of attack is becoming more common, as it requires a lot of computing power – and therefore energy – to mine cryptocurrency.
Unlike crypto-ransomware, hackers generally don’t take data or systems hostage or demand money from the victim. Their main aim is to remain undetectable.
Why is cryptomalware dangerous?
Despite there being no immediate threat to your data, it is important to prevent these types of attacks as it exposes your devices to threat actors who might target you in future. It also enables uncontrolled use of your computational resources and power, which will create performance issues on your device and could result in hefty electricity bills.
How to detect cryptomalware?
As mentioned, the aim of cryptojacking is to remain undetectable for as long as possible, so it won’t be immediately clear if your device is infected. Key things to look out for include:
- Your device runs slower than usual
- Your device overheats more than usual, or the processor and graphics card get damaged without any reason
- Higher than expected electricity costs
How to avoid cryptomalware?
The ways to protect yourself against cryptomalware are similar to those you would against other types of malware:
- Beware of links in emails, and never click a link from someone you don’t know
- Keep all your systems up to date, and make sure you have completed the latest security updates on your devices
- Use a good antivirus software
- Be careful about the websites you visit. Compromised websites will run JavaScript code automatically, allowing attackers to cryptojack
- Install ad-blockers and anti-crypto mining extensions, and always use the latest version of web browsers and extensions.